CN214319340U - Air-water backwashing device - Google Patents
Air-water backwashing device Download PDFInfo
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- CN214319340U CN214319340U CN202120294509.7U CN202120294509U CN214319340U CN 214319340 U CN214319340 U CN 214319340U CN 202120294509 U CN202120294509 U CN 202120294509U CN 214319340 U CN214319340 U CN 214319340U
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- baffle
- overflow tank
- separation
- interception
- air
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Abstract
The utility model relates to an air water back flush device belongs to back flush technical field, install the overflow tank on filtering pond body inner wall and install the backwash baffle in the overflow tank both sides including both ends, backwash baffle's height that highly is higher than the overflow tank, set up the interception bottom plate between backwash baffle's bottom and the overflow tank, this interception bottom plate sets up the fretwork hole, the interception layer that the space that forms between interception bottom plate and backwash baffle, the overflow tank is filled the installation and is had filtering capability for solve the washing effect that back flush device among the prior art exists poor, the filtering layer easily runs off and blocks up the technical problem of valve.
Description
Technical Field
The utility model relates to an air water back flush device belongs to back flush technical field.
Background
The expansion rate is 35-50%, the height between the top of the washing tank and the top of the filter layer (namely the installation height of the washing tank) is equal to the expansion height of the filter layer and the height of the washing tank, and is about 1-1.2m, which is equivalent to that the forward water pressure of 0.01-0.012MPa is still above the filter layer during backwashing. Under the pressure, the backwashing gas is difficult to gradually synthesize large bubbles from small bubbles in the rising process of the backwashing gas in the filter layer, the extrusion-relaxation effect and the shearing force of the small bubbles on the filter layer are far lower than those of the large bubbles, so that the flushing effect is reduced, the higher flushing strength has to be adopted, and in addition, the filter material is usually lost along with the backwashing water due to the expansion of the filter layer in the conventional gas-water backwashing, and the filter material enters a pipeline to block a pipeline valve.
SUMMERY OF THE UTILITY MODEL
The utility model provides an air water back washing device to the not enough of prior art existence for the washing effect that the back washing device exists among the solution prior art is poor, the filtering layer easily runs off and blocks up the technical problem of valve.
The utility model provides an above-mentioned technical problem's technical scheme as follows: the utility model provides an air water back flush device, includes that both ends are installed the overflow tank on the filtering pond body inner wall and are installed the backwash baffle in the overflow tank both sides, the height that highly is higher than the overflow tank of backwash baffle, set up the interception bottom plate between the bottom of backwash baffle and the overflow tank, this interception bottom plate sets up the fretwork hole, the interception layer that the installation has filtering capability is filled to the space that forms between interception bottom plate and backwash baffle, the overflow tank.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Furthermore, the interception layer is made of filler materials.
Further, the overflow tank sets up to U type slot structure, separation drainage plate is all installed with the junction of both sides interception bottom plate to the overflow tank, and this separation drainage plate slope sets up.
Furthermore, separation baffles are arranged at the joints of the backwashing baffle and the intercepting bottom plates on the two sides, and the included angle between each separation baffle and the intercepting bottom plate is an acute angle.
Furthermore, the tail end of the separation baffle is positioned above the separation drainage plate, and a gap is reserved between the tail end of the separation baffle and the separation drainage plate.
Further, the exhaust pipe is installed on the outer wall of the backwashing baffle, the bottom end of the exhaust pipe is located in a gap between the separation drainage plate and the separation baffle, and the top end of the exhaust pipe is higher than the backwashing baffle.
Further, an aeration head is arranged at the bottom of a filter layer of the filter tank.
The utility model has the advantages that: by arranging the overflow tank, the backwashing baffle and the interception layer, backwashing air water is filtered through the interception layer, and a filter material which is separated from the filter layer by backwashing is intercepted in the filter tank and is prevented from entering a water outlet pipe of backwashing water to block a pipeline valve, so that the failure rate of the device is reduced, and the backwashing effect is improved; by arranging the separation drainage plate and the separation baffle, the backwashing water flow is drained and filtered through the interception layer, so that the impulsive force of the water flow is increased, and the backwashing efficiency is improved; through setting up aeration head and blast pipe, the bubble is favorable to improving the back flush dynamics to the filtering layer during back flush, and rethread blast pipe is got rid of unnecessary air.
Drawings
Fig. 1 is a top view of the present invention;
fig. 2 is a sectional view of the used state at a-a in fig. 1.
In the figure, 1, a backwashing baffle, 2, an overflow tank, 3, an exhaust pipe, 4, an interception layer, 5, a separation drainage plate, 6, a separation baffle, 7, an interception bottom plate, 8, a filter body and 9, an aeration head are arranged.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
An air-water backwashing device comprises an overflow tank 2 and backwashing baffles 1, wherein two ends of the overflow tank 2 are arranged on the inner wall of a filter body 8, the backwashing baffles 1 are arranged on two sides of the overflow tank 2, a filter layer is arranged in the filter body 8 and is positioned below the backwashing device, the height of the backwashing baffle 1 is higher than that of the overflow tank 2, the overflow tank 2 is provided with a backwashing water outlet, an intercepting bottom plate 7 for placing an intercepting layer 4 is arranged between the bottom of the backwashing baffle 1 and the overflow tank 2, the intercepting bottom plate 7 is provided with a hollow hole for reverse flushing water to pass through, the intercepting layer 4 with filtering function is filled and arranged in a space formed between the intercepting bottom plate 7 and the backwashing baffles 1 and the overflow tank 2, the intercepting layer 4 is made of filler materials, backwashing air water is filtered through the intercepting layer 4, and the intercepting filter material separated from the filter layer by backwashing is arranged in the filter, the water outlet pipe of the backwashing water is prevented from being blocked by the valve of the pipeline, the failure rate of the device is reduced, and the backwashing effect is improved.
The overflow tank 2 is of a U-shaped groove structure, separation drainage plates 5 are arranged at the joints of the overflow tank 2 and the two side intercepting bottom plates 7, the separation drainage plates 5 are obliquely arranged, separation baffle plates 6 are arranged at the joints of the backwashing baffle plate 1 and the two side intercepting bottom plates 7, the included angles of the separation baffle plates 6 and the intercepting bottom plates 7 are acute angles, the tail ends of the separation baffle plates 6 are located above the separation drainage plates 5 and have gaps with the separation drainage plates 5, and through arrangement of the separation drainage plates 5 and the separation baffle plates 6, backwashing water flow is guided to be filtered through the intercepting layers 4, so that the impulsive force of water flow is increased, and the backwashing efficiency is improved.
An exhaust pipe 3 is installed on the outer wall of the backwashing baffle 1, the bottom end of the exhaust pipe 3 is located in a gap between a separation drainage plate 5 and a separation baffle 6, the top end of the exhaust pipe 3 is higher than the backwashing baffle 1, a plurality of aeration heads 9 are arranged at the bottom of a filter layer of the filter, bubbles are favorable for improving the backwashing strength of the filter layer during backwashing by arranging the aeration heads 9 and the exhaust pipe 3, and redundant air is discharged by the exhaust pipe 3.
The back washing process of the device is as follows: when the operating liquid level rises, backwashing is started, a water inlet and a water outlet of the filter tank are closed, a backwashing valve and an aeration head 9 are opened, backwashing water and air are started simultaneously, when the water level of the air-water mixture reaches the bottom of an overflow tank 2, the air-water mixture passes through an interception layer 4, backwashing wastewater enters the overflow tank 2, filter materials of a filter layer carried by backwashing flow back to the filter layer through a separation drainage plate 5 and a separation baffle 6, the height of the backwashing baffle 1 is higher than that of the overflow tank 2, so that the filter materials can be ensured not to enter the overflow tank 2 along with backwashing water, a pipeline valve can be ensured not to be blocked by the filter materials, after multiple times of backwashing, the aeration head 9 stops working, water continues to flow to scour the filter layer, and redundant air is removed.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (7)
1. An air-water backwashing device is characterized in that: install the overflow tank on the filtering pond body inner wall and install the backwash baffle in the overflow tank both sides including both ends, the height that highly is higher than the overflow tank of backwash baffle, set up the interception bottom plate between the bottom of backwash baffle and the overflow tank, this interception bottom plate sets up the fretwork hole, the interception layer that the space packing installation that forms has filtering capability between interception bottom plate and backwash baffle, the overflow tank.
2. The air-water backwashing device of claim 1, which is characterized in that: the interception layer is made of filler materials.
3. An air-water backwashing device according to claim 1 or 2, wherein: the overflow tank sets up to U type slot structure, separation drainage plate is all installed with the junction of both sides interception bottom plate to the overflow tank, and this separation drainage plate slope sets up.
4. The air-water backwashing device of claim 3, wherein: and the connection parts of the backwashing baffle and the intercepting bottom plates on the two sides are respectively provided with a separation baffle, and the included angle between the separation baffle and the intercepting bottom plates is an acute angle.
5. The air-water backwashing device of claim 4, wherein: the tail end of the separation baffle is positioned above the separation drainage plate, and a gap is reserved between the tail end of the separation baffle and the separation drainage plate.
6. The air-water backwashing device of claim 5, wherein: an exhaust pipe is installed on the outer wall of the backwashing baffle, the bottom end of the exhaust pipe is located in a gap between the separation drainage plate and the separation baffle, and the top end of the exhaust pipe is higher than the backwashing baffle.
7. The air-water backwashing device of claim 6, wherein: and an aeration head is arranged at the bottom of a filter layer of the filter tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120294509.7U CN214319340U (en) | 2021-02-02 | 2021-02-02 | Air-water backwashing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120294509.7U CN214319340U (en) | 2021-02-02 | 2021-02-02 | Air-water backwashing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214319340U true CN214319340U (en) | 2021-10-01 |
Family
ID=77907473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120294509.7U Active CN214319340U (en) | 2021-02-02 | 2021-02-02 | Air-water backwashing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214319340U (en) |
-
2021
- 2021-02-02 CN CN202120294509.7U patent/CN214319340U/en active Active
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